Pamphlets on Forestry, Volume 61991 |
From inside the book
Results 1-3 of 86
Page 57
... soil is , however , probably in itself insufficient to prevent the growth of trees . Two specimens of the surface - soil of the Plains and two from the surrounding territory where trees of fair size are growing were analyzed . These ...
... soil is , however , probably in itself insufficient to prevent the growth of trees . Two specimens of the surface - soil of the Plains and two from the surrounding territory where trees of fair size are growing were analyzed . These ...
Page 77
... soil and the flow of water cannot be doubted . The recuperative effects of forests on soils have already been referred to . In sandy soils they prevent shifting and leaching . Soils are kept in a soft , porous condition by a protective ...
... soil and the flow of water cannot be doubted . The recuperative effects of forests on soils have already been referred to . In sandy soils they prevent shifting and leaching . Soils are kept in a soft , porous condition by a protective ...
Page 31
... soil and the amount of sunlight above . The chemical constitution of the soil is of very much less importance . Hence , we must do all in our power to keep the forest soil like a great sponge , and must keep it from the drying action of ...
... soil and the amount of sunlight above . The chemical constitution of the soil is of very much less importance . Hence , we must do all in our power to keep the forest soil like a great sponge , and must keep it from the drying action of ...
Common terms and phrases
acres agri agricultural annual bark beetles borer branches Castanea cedar swamp cent city boys climate Committee Connecticut course covered crop cultivated deciduous destruction eggs estry European farm experience farm practice farmer boys feet high foliage forest reserves forestry grafted growing growth important inches in diameter industries insects interest Japanese Japanese chestnut lake large number larva larvæ leaves Luther Burbank maple mountain National Business League nature NORWAY SPRUCE nursery organization owners Parry Bros Pinus pitch pine Planters of America planting portion present President profitable protection pupa purpose Quercus red cedar reforest the country reforestation region Ridgely sand seed seedlings soil South Jersey Southern Interior sowing species sprouts spruce streams stump supply surveys tax land thin timber tion tract Tree Planters United valuable varieties waste white cedar white pine wind wood lot woodland Zon's